PDF malware analysis — malicious · a6e6619490a53a5d

MALICIOUS

PDF

95.1 KB Created: 2021-06-30 12:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 65e1adca03417eb3fd9df49ef7dc7315 SHA-1: 6e8ee385cff591b606973595eebf2de41bf04429 SHA-256: a6e6619490a53a5d145f60ef9a552eef6b90b6e60e40a69bd13486ecac91055e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farms strongly suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9806

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://queure.ru/uplcv?utm_term=administrative+management+theory+henri+fayol PDF link annotation
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d96b391d64b---solevimonalisugijene.pdfIn PDF document text
- http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/lududimozanabinefataw.pdfIn PDF document text
- https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/4c92056637a9305784d5f06ec7c649f4/51741369723.pdfIn PDF document text
- http://kamkmori.cz/ckfinder/userfiles/files/botinaduxen.pdfIn PDF document text
- http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c89b44a7d---58974985827.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce1901ed89---70748798737.pdfIn PDF document text
- http://a2itsolutions.com/chop/multimedia/userfiles/file/12105675431.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d0c70ded4eaa5ccc1fabe11f0960d6a9/46930443882.pdfIn PDF document text
- https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/af25b7d62f9e88ca2211bcc070e38147/60122251569.pdfIn PDF document text
- https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5f22c3bc8---65593791508.pdfIn PDF document text
- http://dgjst.com/upfile/file/zuterupulir.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad1a52d426---49935887899.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a897e7bc2---vufifukosigirotivim.pdfIn PDF document text
- http://laptopplus.be/app/webroot/files/userfiles/files/zidupobo.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/7bf919e09ffc5d0718d16f6930065833/sesinewewefix.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a93cb8e2369---48556291559.pdfIn PDF document text
- http://nessium.net/userfiles/file/96638512326.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/a97f4b00edf05e8da6b01d9a5ff019b2/wowinasemikakapolep.pdfIn PDF document text
- https://poolpoint.be/uploads/file/wegutulemafovokana.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a883cdcfe35---61906543090.pdfIn PDF document text
- https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/894d368018e2ebb1fadb2f1570b10734/vivipepeterexotuwab.pdfIn PDF document text
- http://cz-synergy.cz/data/file/57192588885.pdfIn PDF document text
- http://rubensova16.cz/files/file/58209983527.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/vm6f53tcliblq2i57edvvvh03o/zugawepejabuturafuj.pdfIn PDF document text
- http://mdc.ir/ckfinder/userfiles/files/vugemut.pdfIn PDF document text
- http://www.anjhimayath.com/upload/file/pisazedevumigogofamupuxo.pdfIn PDF document text
- https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c663ea152ca---80794267827.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010ffa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FFA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012811.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12811	10960 bytes
SHA-256: `32513eaa156a6cd191ca086aafad287ec0dba2180fc8c1244c4fbe2ac613c3fa`
`font_02_sfnt_off00014118.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14118	17708 bytes
SHA-256: `2d6ca7b991e2f78eb1089e0fdce0533a77785a2537e670983992256415961a6b`

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